The Duly Diligent Stock Investor is a practical, step-by-step guide to investing in stocks as if you were buying a business that you intend to own for a very long time. Long-term investing in fine companies is not the only way to make money but it happens to be the way very rich and famous investor Warren Buffett has made his billions.

But how do you know if a company is worthy of your investment? How do you know if becoming a part-owner will help you achieve your financial goals? How do you know you're not putting your money into a company headed for failure? Isn't Wall Street your...